/*
 * Copyright 2007-2016 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.ymate.platform.examples.interceptor;

import net.ymate.framework.core.Optional;
import net.ymate.framework.core.util.WebUtils;
import net.ymate.framework.webmvc.ErrorCode;
import net.ymate.framework.webmvc.WebResult;
import net.ymate.platform.core.beans.intercept.IInterceptor;
import net.ymate.platform.core.beans.intercept.InterceptContext;
import net.ymate.platform.core.i18n.I18N;
import net.ymate.platform.examples.base.Constants;
import net.ymate.platform.examples.base.UserSessionBean;
import net.ymate.platform.webmvc.context.WebContext;
import net.ymate.platform.webmvc.view.View;
import org.apache.commons.lang.StringUtils;

import javax.servlet.http.HttpServletRequest;

/**
 * @author 刘镇 (suninformation@163.com) on 16/3/12 下午9:54
 * @version 1.0
 */
public class UserSessionCheckInterceptor implements IInterceptor {

    public Object intercept(InterceptContext context) throws Exception {
        switch (context.getDirection()) {
            case BEFORE:
                if (UserSessionBean.current() == null) {
                    String _resourceName = StringUtils.defaultIfBlank(context.getOwner().getConfig().getParam(Optional.I18N_RESOURCE_NAME), "messages");
                    String _message = I18N.load(_resourceName, Constants.I18N_SESSION_TIMEOUT);
                    if (WebUtils.isAjax(WebContext.getRequest())) {
                        return WebResult
                                .CODE(ErrorCode.USER_SESSION_INVALID_OR_TIMEOUT)
                                .msg(_message)
                                .toJSON();
                    }
                    HttpServletRequest _request = WebContext.getRequest();
                    StringBuffer _returnUrlBuffer = _request.getRequestURL();
                    String _queryStr = _request.getQueryString();
                    if (StringUtils.isNotBlank(_queryStr)) {
                        _returnUrlBuffer.append("?").append(_queryStr);
                    }
                    return View.redirectView(WebUtils.buildURL(_request, "login?redirect_url=" + WebUtils.encodeURL(_returnUrlBuffer.toString()), true));
                }
                break;
        }
        return null;
    }
}
